mc146818rtc.h 736 B

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  1. /* SPDX-License-Identifier: GPL-2.0-or-later */
  2. #ifndef _ASM_POWERPC_MC146818RTC_H
  3. #define _ASM_POWERPC_MC146818RTC_H
  4. /*
  5. * Machine dependent access functions for RTC registers.
  6. */
  7. #ifdef __KERNEL__
  8. #include <asm/io.h>
  9. #ifndef RTC_PORT
  10. #define RTC_PORT(x) (0x70 + (x))
  11. #define RTC_ALWAYS_BCD 1 /* RTC operates in binary mode */
  12. #endif
  13. /*
  14. * The yet supported machines all access the RTC index register via
  15. * an ISA port access but the way to access the date register differs ...
  16. */
  17. #define CMOS_READ(addr) ({ \
  18. outb_p((addr),RTC_PORT(0)); \
  19. inb_p(RTC_PORT(1)); \
  20. })
  21. #define CMOS_WRITE(val, addr) ({ \
  22. outb_p((addr),RTC_PORT(0)); \
  23. outb_p((val),RTC_PORT(1)); \
  24. })
  25. #endif /* __KERNEL__ */
  26. #endif /* _ASM_POWERPC_MC146818RTC_H */